Proposed Hanford Reach Juvenile Fall Chinook Protection Program February by bronbron

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									    Proposed 2002 Hanford Reach Juvenile Fall Chinook Protection Program
                                                 February 25, 2002

The objectives for development of this program as proposed by the mid-Columbia hydroelectric
operators are:
       1.      Provide a high level of protection for rearing fall chinook fry;
       2.      Maintain reasonable load following capability at all 7 projects;
       3.      Monitoring and evaluation that allows evaluation of the program relative to its ef-
               fect on entrapment and stranding; and
       4.      A monitoring program that allows in-season changes of operations if substantial
               mortality is detected.
       5.      If possible, within the requirements of flood control, power generation, project
               operating constraints, and the BO, a goal of the program will be to incorporate the
               objective of releasing GCL weekly average discharge in a constant or steadily in-
               creasing manner.

2002 Program Elements

Starting Program Operating Constraints

1. Begin index seining (6 standard beach seine hauls at pre-determined locations) one week
   prior to the calculated start of emergence under the Vernita Bar Agreement. Index seining
   will be conducted daily to define the beginning of susceptibility.

2. Start operational constraints for 2002 program when a daily total of 50 or more sub-yearling
   chinook is sampled from the 6 index seining stations. During each index seining sample,
   sub-yearling fork length will be reported. After program is initiated, decrease index seining
   to one time per week.

When PRD discharge1 is between Vernita Bar Agreement minimum and 80 kcfs:

When discharge at Priest Rapids is between VBA minimum and 80 kcfs, the mid-Columbia pro-
jects will limit flow fluctuations at Priest Rapids to no more than 20 kcfs.

When PRD discharge is between 80 and 110 kcfs:

When discharge at Priest Rapids is between 80 and 110 kcfs, the mid-Columbia projects will
limit flow fluctuations at Priest Rapids to no more than 30 kcfs.

When PRD discharge is between 110 and 140 kcfs:

When discharge at Priest Rapids is between 110 and 140 kcfs, the mid-Columbia projects will
limit flow fluctuations at Priest Rapids to no more than 40 kcfs.

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  Priest Rapids discharge will be calculated in 2 separate ways: for weekdays it will be a rolling 5-day average of
the previous 5 weekdays; for weekends it will be the BPA Friday PRD estimates for Saturday and Sunday.
When PRD discharge is between 140 and 170 kcfs:

When discharge at Priest Rapids is between 140 and 170 kcfs, the mid-Columbia projects will
limit flow fluctuations at Priest Rapids to no more than 60 kcfs.

When PRD discharge is greater than 170 kcfs:

When discharge at Priest Rapids is greater than 170 kcfs, the mid-Columbia projects will main-
tain a 150 kcfs minimum hourly discharge at Priest Rapids.

Ending Program Operating Constraints

When 400 or more temperature units (°C) have accumulated following the end of emergence
under the Vernita Bar Agreement, the operating constraints identified above will end.

2. Monitoring will continue depending on presence of subyearling chinook as identified below.

Monitoring, Evaluation and Adaptive Management

1. Monitoring under this program would consist of random sampling on a 8.5 mile subsection
   of the Hanford Reach (RM 364.5 to RM 373). This stretch runs from approximately the up-
   stream end of Locke Island down to an area just upstream of Hanford Slough. Crews would
   consist of a two person crew consisting of WDFW and Grant PUD personnel sampling seven
   days a week. Random samples will be taken within this 8.5 RM sampling area based on pre-
   viously established protocols for selecting from a list of possible random sampling plots
   within each 10 kcfs flow band. Grant PUD will provide funding for this effort and a weekly
   summation will be provided to Grant PUD.

2. If the field monitoring crew observes that a significant fall chinook mortality event is occur-
   ring or imminent, they will immediately notify the designated representative of the Washing-
   ton Department of Fish and Wildlife (WDFW) and explain the situation. The WDFW repre-
   sentative will confirm whether a significant fall chinook mortality event is occurring or im-
   minent and decide whether to request a modification of operations. If alteration of operations
   appears appropriate, the WDFW representative will notify Grant County PUD immediately
   to discuss a remedy. If Grant County PUD concurs that a significant fall chinook mortality
   event is occurring or imminent, it will consult, as necessary, with other operators and an op-
   erational remedy will be implemented expeditiously.

3. Until stranding susceptibility ends, a weekly report for the Monday through Sunday time pe-
   riod will be produced by Grant County PUD and the WDFW. This report will be available
   on the Technical Management Team (TMT) website at the following URL:
                    < www.nwd-wc.usace.army.mil/cgi-bin/proposal.cgi?type=index>
   and will be presented at the weekly TMT meetings. This report will also be distributed to the
   Hanford Reach Stranding Policy Group each Tuesday morning by e-mail. The TMT will
   serve as a forum for information exchange and will not be involved in decision making under
   this Program. It is anticipated that TMT decisions will facilitate and support activities under
   this Program. The authority for implementing any changes under this Program rests with the


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mid-Columbia projects and any disputes will be handled through meetings of the Hanford
Reach Stranding Policy Group.

   A. The weekly report will include the following operational information for each day:
      minimum hourly discharge from Priest Rapids Dam (PRD), maximum hourly dis-
      charge from PRD and day average discharge at PRD. The report will also provide
      weekly average discharge at PRD for each day which will be calculated as a rolling
      seven day average.

   B. The weekly reports will also include the following field monitoring information for
      each day: number of samples taken, number of stranded or entrapped chinook fry and
      number of chinook mortalities.




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